Which actor's had a creepy ginger make-over?

This well-known British star should probably see a doctor about his hair's shocking transition to full-blown ginger. Who is it?

Doctor Who's former leading man David Tennant has dyed his hair an especially alarming shade of ginger for a role in a "surreal" new British comedy series.

(I believe the technical name of his new hair colour is Gillard Sunset, or possibly Weasley's Blush — I'd need to ask an expert colourologist for confirmation.)

In This is Jinsy, Tennant will play Mr Slightlyman, "an outrageously camp wedding planner with a penchant for plastic surgery". His self-declared nickname is the "Master of Balls"... because he's in charge of the marriage lottery. Of course.